Feeding device for pegging-strips in pegging devices.



I. LARSEN. FEEDING DEVICE FOR PEGGING STRIPS IN PEGGING DEVICES.

-APPLICATION FILED FEB. 9, I9I7. I

Patented Nov. 12, 1918.

I /2 I I WITNESSES Il/I/VENTOR UNITED STATES PATENT OFFICE.

JULIUS LARSEN, OF COPENHAGEN, DENMARK.

FEEDING DEVICE FOR PEG GING-STRIPS IN PEGGING IDE'V'TCES.

Application filed February 9, 1917.

To all whom it may concern:

Be it known that I, J ULrUs LARSEN, residing at Copenhagen, Denmark, have invented certain new and useful Improvements in Feeding Devices for Pegging-Strips in Pegging Devices, of which the following is a specification.

WVhen pegging soles on boots and shoes it has proved to be a great advantage to be able to control the breadth of the peg cut off from the strip, as the peg thereby gets more or less compressed in the feed funnel before it is hammered down in the hole, formed by the awl, and in the pegging machines now in use there has therefore been used a feeding device for wooden strips, which may be changed or controlled, but this control is most frequently effected by means of a pawl and a pawl disk, so that by'regulating the movement of the pawl. the number of'teeth passed by it. may be varied. By thisor similar devices the feeding can however not be regulated with greater accuracy than a single tooth. and this has proved to be afar from sufiicient accuracy in modern pegging machines, which work with great speed, since the leather as well as the wood in the wooden strips may be of dilferent hardness, degree and structure, and the present invention therefore aims at an improvement, by which the feeding of the-wooden= strip may be regulated with a practically unlimited precision.

If for instance, a feed funnel with mini mum diameter of 1.5 millimeters is used. the breadth of the wooden strip may be varied from 1.5 up to 2.5 or 3 millimeters in proportion to the hardness of the wood and the leather, the diameter of the awl, &c.. and at the same time the quadratic pegging material is pressed cvlindrically by passing the round feed funnel.

The invention is shown on the drawing, where Figure 1 shows the feeding apparatus seen from above.

Fig. 2 the same in enlarged scale seen from the side.

Fig. 3 is a horizontal longitudinal section through the very organs, serving to feed the wooden strip, and

Fig. 4 shows the gripper itself.

On the drawing 1 is the machine frame with feed funnel 16, which in known manner may be funnel shaped. The feeding device Specification of Letters Patent.

Patented Nov. 12, 1918.

Serial No. 147,584.

consists of a cylinder 5, which is mounted in the frame 15 of the machine itself, and is inclosed by a screw spring 7, which pressing against the frame 15 and against a pin 20 in the end of the cylinder serves to keep the cylinder in the backward drawn position. The cylinder has in its extreme end a head 19, in which is applied a pivot 13 for a friction roller 12, which cooperates with a disk 18, which rotates around a horizontal shaft and is provided with a cam 11. Normally the roller 12 will run along the disk 18, but every time the cam 11 passes behind the roller 12, the latter and thereby the whole cylinder 5 will move outward, overcoming the resistance of the spring 7 In the cylinder is mounted an arm 8, the outmost curved-end 3' of which is provided with slanting teeth 4 and acts as gripper for the wooden strip 2. The arm which is held pressed outward by aweak screw spring 6, has a slanting edge 17, which cooperates with a corresponding slanting edge 14- in the cylinder head 19. Finally this has also a screw9, the frusto-conical end 10 of which guides and restricts the lateral movement of the gripper.

Normally the gripper 3 is pressedagainst the wooden strip 2 by the weakipressure from the spring 6, as the gripper will have a position to the cylindertrnearly as shown on Fig. 3 and exactly as shown on Fig. 1.

When the cam 11 during the revolving of the disk 18 pushes forward the roller 12 and therebythe cylinder 5, the slanting edge or plane 14 of the latter will hit the corresponding plane 17 on the gripper and thereby guide this and therewith also the wooden strip 2 forward toward the funnel 16. When the cam 11 is passed, the cylinder 5 will, by the strong spring 7 be drawn back, and the frusto-conical end 10 of the screw 9 will thereby slide on over the planes cl, 0, b and a and thereby push the gripper over in the first position. At the same time it will press the gripper a little back, so that it does not or only with very slight pressure operate on the wooden strip, by which this will not go back with the gripper. The movement forward of the latter is as mentioned restricted by the frusto-conical end of the screw 9,-and by screwing this more or less in, the lateral movement of the gripper may be varied with a quite exceedingly great fineness.

IOU

By suitable form of the planes (Z, c, b and a the movement of the gripper in against the wooden strip may be adjusted in such a manner, that it is done by a small stroke, represented by the length of the plane a, so that the teeth at get a good hold of the wooden strip.

What I claim, and desire to secure by Letters Patent is:

1. In a feeding device for the pegging strips of pegging machines, a sliding and spring pressed cylinder, a spring pressed and sliding gripper in the cylinder, said gripper being free to move laterally, cooperating means on the cylinder and gripper for moving the latter laterally, and means for sliding the cylinder against the action of its spring.

'2. In a feeding device for the pegging strips of peg ing machines, a sliding and spring pressed cylinder provided with a head having a beveled surface, a sliding and spring pressed toothed gripper having a beveled surface cooperating with the beveled surface of the cylinder, said gripper being free to move laterally, means for adjusting the lateral movement of the gripper, and means for moving the cylinder against the action of its spring.

3. In a feeding device for the pegging strips of pegging machines, a sliding spring pressed cylinder having a head provided with a beveled surface, a sliding and spring pressed gripper in the cylinder, said gripper being free to move laterally and having a beveled surface cooperating with the beveled surface of the cylinder, a screw engaging the gripper for adjusting the lateral movement of the gripper, and means for sliding the cylinder against the action of the spring.

4. In a feeding device for the wooden strips of pegging machines, the combination of a frame and a rotating disk provided with a cam, of a sliding and spring pressed cylinder mounted in the cylinder and adapted to be moved by the cam against the action of the spring, said cylinder having a head provided with a beveled surface, a clawshaped gripper provided with a beveled surface cooperating with the beveled surface of the cylinder and With a plurality of guiding planes, and a frusto-conical screw mounted in the head of th cylinder and engaging the said planes, whereby the-gripper may be shifted and thereby the shifting of the wooden strip so regulated that the thickness of the peg is regulated with great precision.

5. A feeding device for the wooden strips of pegging machines, comprising a cylinder having a head provided with a beveled surface, a spring pressed claw-shaped gripper mounted in the cylinder to have sliding and lateral movement, said gripper being provided with a beveled surface adapted to cooperate with the beveled surface of the cylinder to move the gripper laterally and with a plurality of guiding planes, and a frustoconical screw mounted in the head of the cylinder and adapted to engage the guiding planes of the gripper.

In testimony whereof I aiiix my signature in presence of two witnesses.

JULIUS LARSEN.

Witnesses CHARLEs Home, First. MARKEN.

Copies of this patent may be obtained for five cents each. by addressing the Commissioner of Patents,

Washington, D. G. 

